http://www2.timesdispatch.com/news/news/2012/jun/02/civil-war-photography-still-reveals-details-ar-1959986/Anyone in the Richmond area should see Richmond National Battlefield Park Ranger Mike Gorman's presentation if you have the opportunity. (Next show - Sun., June 3 @ Henrico Theater, 305 E. Nine Mile Road, it's free.)
There are photos that will interest those who have an interest in projectiles - field pieces, projectiles, Tredegar, etc.
If you liked the article, be sure to click the links in the "Related" box. There are photos & a video.